What is the purpose of a crash cushion truck?

What is the reason why the Volkswagen Polo's wiper does not spray water?

The reasons and solutions for the Volkswagen Polo's wiper not spraying water are as follows: Wiper spray pipeline failure: The reasons for the wiper not spraying water include insufficient wiper fluid; improper selection of wiper fluid, which freezes in winter; failure of the spray motor; blockage of the wiper spray pipeline and nozzles, etc. Solutions: First, check if the windshield washer fluid is used up and add it in time if it is. Check if the spray hose is damaged or if the connection is loose. Check if there is an issue with the spray motor by having one person press the windshield washer spray switch while another listens near the motor for the sound of the motor working. If there is no sound of the motor working, it can be roughly judged that the motor has a problem. If the motor is not working, do not rush to conclude that the motor is burned out and immediately replace it. First, be sure to check if there is an issue with the motor's circuit. Modern cars basically have a fuse in front of the motor's circuit. Take out the fuse and check if it is burned out. If the fuse is burned out, replace it with a new one.

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Why can Audi only use 95 octane gasoline?

According to the official vehicle manual recommendation, Audi should use 95 octane gasoline. If Audi occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, long-term use of incorrect gasoline grades may have the following effects: For vehicles recommended for lower octane, using higher octane gasoline will not cause damage, but the increased octane rating will alter the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance in practice. For vehicles recommended for higher octane, using lower octane gasoline can cause engine knocking. Because the octane rating is too low, the reduced ignition point may cause premature ignition during the compression stroke. If combustion occurs before the spark plug fires during the compression stroke, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. If the knocking is imperceptible, it only increases noise without significant engine damage. However, noticeable knocking indicates severe engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring. In addition to checking the appropriate gasoline grade in the vehicle manual, Audi owners can also find this information on the fuel filler cap. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with a compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade. High compression ratio engines can still be tuned to use lower octane gasoline because, besides the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline octane rating, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane.

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How many cylinders does the BMW 730Li have?

BMW 7 Series 730Li is a four-cylinder car, while BMW 7 Series 740Li is a six-cylinder car. Differences in cylinder count: Generally, under the same displacement, the more cylinders there are, the smaller the cylinder bore. Therefore, under the same displacement, a three-cylinder engine has a larger bore than a four-cylinder engine. There are differences in power and fuel consumption: compared to a three-cylinder engine, a four-cylinder engine offers better power, faster acceleration, and more stable body control, but it also consumes slightly more fuel. Structurally, a three-cylinder engine has one fewer cylinder than a four-cylinder engine, along with corresponding reductions in the ignition system, fuel supply system, connecting rods and crankshaft, and camshaft components. Thus, a three-cylinder engine is structurally simpler than a four-cylinder engine. Engine cylinder classification: Currently, engines on the market are generally categorized into L4 (inline four-cylinder), H4 (horizontally opposed four-cylinder), V6 (V-type six-cylinder), W12 (W-type twelve-cylinder), etc. Some of these can be directly identified from the rear badge of the car, such as the Crown's 2.5V6, etc. For ordinary family cars, three-, four-, and six-cylinder engines are the most common.

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What is the fuel consumption of the 7th generation Elantra?

The 7th generation Elantra has a total of 7 models currently on sale. Among them, the 2021 1.5L-CVT-TOP Flagship Edition, LUX Premium Edition, and GLX Elite Edition have an NEDC fuel consumption of 5.4L per 100km. The CVT-GLS Leading Edition has an NEDC fuel consumption of 5.3L per 100km. The 240TGDi-DCT-TOP Flagship Edition, DCT-LUX Premium Edition, and DCT-GLX Elite Edition have an NEDC fuel consumption of 5.2L per 100km. The fuel tank capacity of the 7th generation Elantra is the same for all models, at 47L. The distance that can be covered with a full tank of fuel is as follows: 1.5L-CVT-TOP Flagship Edition, LUX Premium Edition, and GLX Elite Edition can cover a distance of 47/5.4*100=870km with a full tank. The CVT-GLS Leading Edition can cover a distance of 47/5.3*100=886km with a full tank. The 240TGDi-DCT-TOP Flagship Edition, DCT-LUX Premium Edition, and DCT-GLX Elite Edition can cover a distance of 47/5.2*100=903km with a full tank. The fuel consumption of a car is directly related to five major factors: driving habits, the car itself, road conditions, natural wind, and environmental temperature. Specific factors that can increase fuel consumption are as follows: Driving habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not easing off the throttle before a red light, can increase fuel consumption. The car itself: Cars with larger engine displacements generally consume more fuel than those with smaller displacements because larger displacements usually mean higher power, requiring more gasoline to burn and perform work. Heavier cars also consume more fuel because greater weight requires more driving torque. Road conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountainous roads increases resistance and fuel consumption. Natural wind: Driving against the wind or on windy days increases the car's resistance and fuel consumption. Low environmental temperatures: When the engine block is cold, the gasoline injected during a cold start does not atomize easily, requiring more gasoline to be injected for combustion, which increases fuel consumption. Additionally, at low temperatures, the engine's computer controls the engine to run at higher RPMs to warm up, which also increases fuel consumption.

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What rear suspension does the new 3 Series use?

The new 3 Series uses a multi-link rear suspension, which is commonly found in most sports cars. The multi-link suspension is an improved version based on the double-wishbone suspension. This type of suspension enhances the tire's grip, thereby improving the car's handling and comfort. The new domestically produced BMW 3 Series is equipped with a 2.0-liter turbocharged four-cylinder engine across the lineup, with the high-power version in the top-tier model delivering 258 horsepower. The engine is paired with ZF's 8AT transmission, known for its fast shifting speed and high transmission efficiency.

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Is Porsche a Brand Under Volkswagen?

Porsche is part of the Volkswagen Group. Here are the relevant details: Brands under the Volkswagen Group: The Volkswagen Group currently owns several renowned automotive brands: Volkswagen (Germany), Audi (Germany), Lamborghini (Italy), Bentley (UK), Bugatti (France), SEAT (Spain), Škoda (Czech Republic), Volkswagen Commercial Vehicles (Germany), and Porsche (Germany). Introduction to Porsche: Porsche is an automobile manufacturer based in Stuttgart, Germany. Porsche's lineup includes models such as the 911, 718, Taycan, Panamera, Macan, and Cayenne. Both the 911 and 718 models from Porsche feature horizontally opposed engines.

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What is the purpose of a crash cushion truck?

What is the reason why the Volkswagen Polo's wiper does not spray water?

Why can Audi only use 95 octane gasoline?

How many cylinders does the BMW 730Li have?

What is the fuel consumption of the 7th generation Elantra?

What rear suspension does the new 3 Series use?

Is Porsche a Brand Under Volkswagen?

How many seconds does the Land Rover Range Rover accelerate?

What Causes Sudden Softening and Ineffectiveness of Car Brakes?

What are the reasons why the Magotan car door cannot be opened?

What does the yellow triangle warning light with an exclamation mark in the Lamando indicate?